Magical Merchant

Edison Card Text
FLIP: Excavate cards from the top of your Deck until you excavate a Spell/Trap Card, then add that card to your hand, also send the remaining cards to the GY.
No targeting
Damage Step • Substep 6
Banlist • Unlimited
Interactions
Should Magical Merchant shuffle even if no appropriate card is revealed?✓
Magical Merchant resolves without revealing a Spell/Trap.
Yes. The Deck should be shuffled after revealing cards, even if none are added to hand.
If I resolve Magical Merchant while Thunder King Rai-Oh is face-up, do I still excavate, and where does the Spell/Trap go?✓
You activate Magical Merchant's effect while your opponent controls Thunder King Rai-Oh.
You still excavate as usual, but you cannot add the Spell/Trap to your hand. The revealed Spell/Trap is sent to the Graveyard, along with the excavated monsters.
Rulings
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●If you pick up your entire Deck and there were no Spell/Trap Cards, the rest of the cards are shuffled back into the Deck.
If "Thunder King Rai-Oh" is applying, all the revealed cards, including the Spell/Trap, are sent to the GY.
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You need to show the cards to your opponent, including the one you keep.
If you pick up your entire Deck and there were no Spell or Trap Cards, then "Magical Merchant"'s effect disappears.